Governor



0. M. GIDDINGS.

GOVERNOR.

Patented June 9, 1885.

N: PETERS. PMM-imngnphu, wuhin mn. o a

(No Model.)

Witn'esses: a I

UNITED V STAT S P TENT OFFICE.

CHARLES M. ernnines, on MASSILLON, onro.

GOVE

RNOR.

' SPECIFICATION forming part of Letters Patent No. 319,696, dated June 9, 1885.

7 Application filed March 12, 1885. (No model.)

To all whom it may concern: 7

Be it known that I, CHARLES M. GIDDINGS, of Massillon, Stark county, Ohio, have invented certain new and useful Improvements in Governors, of which the following is a specification.

This invention pertains to that class of steamengine governors in which the centrifugal mechanism shifts the eccentric which operates the valve, the centrifugal mechanism being mounted upon the main shaft of the engine, or upon a countershaft parallel therewith, and inclosed by a pulley-rim or by a special case.

The invention will be readily understood from the following description, taken in connection with the accompanying drawings, in which Figure 1 is a face view of a mechanism illustrating my improvement; Fig. 2, a similar view, the valve-operating eccentric and centrifugal devices being omitted; Fig. 3, a section of important parts upon line a; Fig. 4, a side view, corresponding with line 0, of certain pats as viewed through a break in the pulley-rim,the adj usting-eccentric F being removed; Fig. 5, a perspective view of the pulley-hub and its attachments dissected; Fig. 6, a transverse section through one of the governor-weights on line b,- Fig. 7, a section through the pulley-rim in a plane at right angles to its axis at a point of attachment of one of the spring-screws, and Fig. 8 a perspective view of a portion of one of the springs with its end fittings.

In the drawings, A represents the fly-wheel of an engine and the case of the governor, to be fast upon its shaft; 13, the hub of the same, concentrically turned to form a journal; 0, a guide in the form of a plate, with dovetail edges secured against the end of the hub; D, the eccentric for operating the engine-valve; E, gibs on the back of this eccentric, engaging the guides (J.

The eccentric D is adapted to move across the shaft, and thereby adjust the stroke of the valve, and it is the duty of the governing mechanism to effect this movement.

F represents an adj usting-ecce tric'revolving freely on the hub B; G, the trap of this eccentric; H, a pair of lugs upon thisstrap,.

iforming parallel cross-head surfaces; and I,

bearing-lugs projecting from the valve-operating eccentric and engaging said cross-head surfaces.

As the adj usting-eccentric F is revolved, the valve-operating eccentric is shiftedacross the engine-shaft. It is the duty of the centrifugal mechanism to rotate the adjustingeccentric.

J represents pivot-points near the periphery of the fly-wheel; K, levers pivoted at those points and reaching across upon each side of the wheel-hub; L, arm's formed upon the hub of the adj usting-eccentric F and carrying piv-p ots; M, links connecting those arms with the weights secured to the levers K, and 0 helical springs attached to the levers and to the rim of the fly-wheel.

Gentrifugal force tends to throw the weights outward and rotate the adjusting-eccentric, thus shifti ng the valve-operating eccentric, and thereby shortening itsstroke. The springs serve to draw the levers inward, to rotate the adjusting eccentric, and to shift the valveoperating eccentric and lengthen its stroke.

P represents threaded plugs screwed into the outer ends of the springs.

Q represents screw's engaging articulately through the rim of the fly-wheel into the plugs P, and R cavities for the heads of the screws Q in the outer periphery of the fly-wheel.

The screws Q serve as the outer attachment for the springs, and as a means for adjusting their tension.

S represents bolted clasps fitted to adjust along the levers K.

The inner ends of the springs engage these clasps, and the clasps can be adjusted along the levers and secured, whereby the effect of the springs upon the levers is adjusted.

The plugs P have square recesses e in their tops for the insertion of a plug-wrench, to be used in screwing the plugs into the springs. The exterior thread of the plugs has a notch and stop, f, and the end of the spring-wire is formed into a tooth, g, to engage the notch. By this means the plug is prevented from turning out of the spring after being properly inserted.

Z represents a threaded plug screwed into free ends of the levers K; N, the governorshoe at the back of this eccentric.

site direction, theattach-ing parts in such case being applied in the alternative positions;

cal with the cavities R and forming an extra may bejsuch in fact; or it may be a mere case the lever end of the springs. These plugs are split, and are of a size to screw freely into the springs. The lever-engaging hooks h have taper square shanks, which serve as a means for screwing the plugs into the springs, and when the strain is on the hooks the taper shanks spread the plugs into ti ght'engagement with the springs.

T represents gib-screws through the face of the valve-operating eccentric; U, a take-up By means of the shoe and screws the va1ve-operating eccentric may be adjusted to a nice and proper sliding fit upon the guides.

V represents pivot points identical with the points J, forming an extra pair; W, cavities in the periphery of the fly-wheel, identipair. These extrapivot-points and cavities are for use in running the engine in the oppo- The weights N are each formed of two parts, T secured together by screws and adapted to clasp its lever, asshown in Fig. 6, and be adjusted and secured along'the lever, whereby the eflect of theweight may be adjusted. i

What Ihave illustrated as the fly-wheel A containing the governing mechanism. 1

p v The eccentricstrap G, with its cross-head surfaces H, may be omitted, providing the bearing-lugs I are moved inward so that their flat inner surfaces engage directly with the periphery of the eccentric F; but in practice I much prefer the strap arrangement, the strap being in two parts bolted together, as indicated in Fig. 2.

I claim as my invention- 1. The combinationof a fly-wheel or other governor-carrier adapted to be secured to its shaft, a rectilinear guide'secured to the same,

a valve-operating eccentric fitted to slide on said guide, an adjusting-eccentric free to rowith an exterior spring-receiving thread having a notch and stop f, and the spring 0, hav-' ing tooth g, substantially as set forth. 4. The combination of spring 0, split p lllg Z, having an exterior spring-receiving thread and a taper hole, and hook h, or equivalent end attachment, having a taperedshank, substantially as set forth.

I CHARLES M. ernnmos:

Witnesses: r Y

GEORGE Hanson,

E. J OSEPHINE VANDUYN. I 

